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    Field Evaluation of Brazilian isolates of Neozygites foridana (Entomophthorales: Neozygitaceae) for the microbial control of cassava green mite in Benin, West Africa

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    Date
    2002
    Author
    Hountondji, F.C.C.
    Lomer, C.
    Hanna, R.
    Cherry, A.
    Dara, S.K.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Two Brazilian isolates and one Benin (indigenous) isolate of Neozygites floridana were released against the cassava green mite, Mononychellus tanajoa , in January 1999 in the Adjohoun district, Ouémé administrative region, Republic of Benin. Post-release monitoring conducted 8, 14, 22 and 36 weeks later showed very low mean infection rates on M. tanajoa by isolate (0.03-0.4%). However, 48 weeks after releases, mean infection rates increased noticeably to between 2.3 and 18.7%, and higher infection rates were observed for the Brazilian isolates compared with the indigenous one. The highest infection rate for the indigenous isolate was 4.5% while it reached over 30% for the Brazilian isolates (36.5 and 34.0%). Observations made to study dispersal from inoculated plants showed the absence of infected mites at 4 m from the inoculated plants in all fields 8 weeks after the releases, while they were already present on those at 2 m away. From the next monitoring, 14 weeks after the releases, infection was found at all three sampling positions (inoculated plants and plants at 2 and 4 m away). Only four mites with resting spores were found in over 460 000 mites examined. The highest infection levels were observed in December during 'harmattan' a period characterized by hot days and cool nights with high relative humidity.
    https://doi.org/10.1080/09583150220128149
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3775
    Digital Object Identifier (DOI)
    https://doi.org/10.1080/09583150220128149
    IITA Subjects
    Pests Of Plants; Plant Diseases; Cassava; Climate Change
    Agrovoc Terms
    Acari; Tetranychidae; Spider; Mites; Mononychellus Tanajoa; Entomopathogens; Acaropathogens; Classical; Biological Control; Release; Recovery; Harmattan
    Regions
    Africa; West Africa
    Countries
    Benin
    Collections
    • Journal and Journal Articles4835
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